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Introduction to Linux - A Hands on Guide

This guide was created as an overview of the Linux Operating System, geared toward new users as an exploration tour and getting started guide, with exercises at the end of each chapter.
For more advanced trainees it can be a desktop reference, and a collection of the base knowledge needed to proceed with system and network administration. This book contains many real life examples derived from the author's experience as a Linux system and network administrator, trainer and consultant. They hope these examples will help you to get a better understanding of the Linux system and that you feel encouraged to try out things on your own.

hey all,
i setup a mdadm raid5 array with an lvm ontop of it. I then put a 400gb onto the array. Then when i restarted the server 1 of the drives converted to a spare and i have no data on the drive (or so it seams). I have tried

I am only guessing, but maybe try to see if there is, in mdadm, a command to scan and activate. THEN see about the LVM (if the md partition is type LVM, you may need to activate the md device first, then type the following:

I once thought I LOST the setup on my drive, but I did not, so, it may be the data is still there. Maybe the assemble command is used for creation, and you just need to say 'Hey, activate this please'. I would advise you READ THE MANUAL PAGES so you can be ABSOLUTELY sure, because, like I said, I thought I LOST my partition completely. If this does not help, sorry. Hope it does